Filtern
Erscheinungsjahr
Dokumenttyp
- Zeitschriftenartikel (67)
- Beitrag zu einem Tagungsband (52)
- Beitrag zu einem Sammelband (45)
- Vortrag (34)
- Sonstiges (7)
- Posterpräsentation (6)
- Buchkapitel (3)
Schlagworte
- Computed tomography (25)
- X-ray refraction (19)
- Reconstruction algorithm (12)
- Computer-Tomographie (10)
- DIRECTT (8)
- Electron tomography (8)
- Rekonstruktionsalgorithmen (8)
- Computertomographie (7)
- Keramik (6)
- Synchrotron radiation (6)
- Composites (5)
- Radiography (5)
- Refraction (5)
- Tomography (5)
- Catalyst (4)
- Ceramics (4)
- Computed Tomography (4)
- Diffuse background (4)
- Fluorescent screen (4)
- Fuel cell (4)
- Komposite (4)
- Missing wedge (4)
- Neutron tomography (4)
- Neutronen-Tomographie (4)
- Phase contrast (4)
- Pore size (4)
- Porous ceramics (4)
- Röntgenrefraktion (4)
- Synchrotron (4)
- X-ray refraction topography (4)
- Aerospace (3)
- Computertomographie (CT) (3)
- Elektronen-Tomographie (3)
- Explosivstoffe (3)
- Hinterleuchten (3)
- Iterative reconstruction (3)
- Limited view (3)
- Materialcharakterisierung (3)
- NDE (3)
- Non-destructive testing (3)
- Polymer electrolyte membrane fuel cell (PEMFC) (3)
- Pore orientation (3)
- Porosity (3)
- Rekonstruktionsalgorithmus (3)
- Röntgen-Refraktions-Topographie (3)
- Soft matter radiography (3)
- Statistische Bewertung (3)
- Synchrotron Radiation (3)
- WAXS (3)
- X-ray (3)
- X-ray Refraction (3)
- X-ray detector backlighting (3)
- X-ray tomography (3)
- X-ray topography (3)
- BAMline (2)
- Bragg magnification (2)
- Cartilage (2)
- Characterization (2)
- Computed Tomography (CT) (2)
- DEI (2)
- Diesel particulate filters (2)
- Diffraction Enhanced Imaging (DEI) (2)
- Diffraction enhanced imaging (2)
- Edge artefact (2)
- Elektronentomographie (2)
- Explosives (2)
- Fluoreszenzschirm (2)
- Foams (2)
- Focal smearing (2)
- Gas diffusion layer (GDL) (2)
- Grating interferometry (2)
- Huygens elementary waves (2)
- Iterative Rekonstruktion (2)
- Kleinwinkelstreuung (2)
- Lightweight Materials (2)
- Lightweight materials (2)
- MMC (2)
- Magnetic domains (2)
- Metal Matrix Composites (MMC) (2)
- Metal matrix composites (2)
- Neutron imaging (2)
- Neutronentomographie (2)
- Nichtmetallische Werkstoffe (2)
- Non-Destructive Inspection (NDI) (2)
- Ortsauflösung (2)
- PEM fuel cell (2)
- Radiographie (2)
- Refraction enhanced imaging (REI) (2)
- Refraction topography (2)
- Region of interest (2)
- Röntgen-Streuung (2)
- Röntgendetektor (2)
- Röntgentomographie (2)
- Spatial resolution (2)
- Specific surface (2)
- Synchrotron Refraction CT (2)
- Synchrotron refraction computed tomography (2)
- Synchrotronstrahlung (2)
- Terahertz-Radiographie (2)
- Ti-MMC (2)
- Tomographische Rekonstruktionsalgorithmen (2)
- Topography (2)
- Water management (2)
- X-Ray Refraction (2)
- X-ray compton scattering (2)
- X-ray refraction tomography (2)
- X-ray scattering (2)
- 3D microstructure (1)
- 3D topography (1)
- 3D-Mikrostruktur (1)
- Advanced Composite (1)
- Advanced ceramics (1)
- Al2O3 ceramics (1)
- Algorithm (1)
- Analyser based imaging (1)
- Analyser-based imaging (1)
- Analyzer based imaging (1)
- Average pore size (1)
- Backlight (1)
- Beta-eucryptite (1)
- Beton (1)
- Bildgebende Radiologie (1)
- Bildgebende Röntgenverfahren (1)
- Bragg Magnification (1)
- Bragg-Magnification (1)
- Bragg-Vergrößerung (1)
- Brennfleck (1)
- Brennstoffzelle (1)
- Brennstoffzellen (1)
- C/C Keramiken (1)
- CFK (1)
- CFRP (1)
- CT (1)
- CT-Algorithmus (1)
- Cavitation (1)
- Coherent imaging (1)
- Complex microstructure (1)
- Composite damaging (1)
- Compounds (1)
- Compression device (1)
- Comptonstreuung (1)
- Computed topography (1)
- Computer Tomographie (1)
- Computer tomography (1)
- Computerised tomography (1)
- Computertomografie (1)
- Concrete (1)
- Cordierit (1)
- Crack Density (1)
- Crack density (1)
- Crystal Texture (1)
- DIVA Algorithm (1)
- DIVA algorithm (1)
- Darkfield imaging (1)
- Detector backlighting (1)
- Detector calibration (1)
- Detektor (1)
- Diesel Fuel (1)
- Diffraktion (1)
- Double-Crystal-Monochromator with sagittal bender (1)
- Double-Multilayer-Monochromator with meridional bender (1)
- Dual Energy (1)
- Dunkelfeldabbildung (1)
- Electronic Power Device IC (1)
- Ermüdung (1)
- Ermüdungsrisse (1)
- FAXOT (1)
- Fatigue (1)
- Few angles (1)
- Fibre Debonding (1)
- Fibre orientation (1)
- Filtering (1)
- Fluorescence screen (1)
- Fuel cell stack (1)
- Gefilterte Rückprojektion (1)
- Geometrical tortuosity (1)
- High pressure mercury intrusion (1)
- Hochleistungswerkstoffe (1)
- Holotomography (1)
- Image morphology (1)
- Impact (1)
- In-Situ Radiologie (1)
- Inhomogeneous materials (1)
- Inner surface (1)
- Inner surface density (1)
- Interface (1)
- Interfaces (1)
- Internal Surfaces (1)
- Internal surface density (1)
- Iterative CT reconstruction (1)
- Konvergenz (1)
- Kurzzeit-Radiometrie (1)
- Limited View (1)
- Limited tomographic data (1)
- Manifold stack (1)
- Materialcharakterisierung und -identifizierung (1)
- Mehrphasige Materialien (1)
- Mercury intrusion porosimetry (1)
- Metal Matrix Composites (1)
- Metal matrix composite (MMC) (1)
- Metrology (1)
- Micro cracks (1)
- Micro-CT (1)
- Micro-computed tomography (1)
- Microcracked ceramics (1)
- Microstructure (1)
- Microstructures (1)
- Microtomography (1)
- Mikroriß (1)
- Missing Wedge (1)
- Modulations-Transfer-Funktion (1)
- Modulations-Transfer-Funktion (MTF) (1)
- Molecular probe (1)
- Monochromatische Radiometrie (1)
- Montmorillonites (1)
- Morphological image analysis (1)
- Multiple View Inspection (1)
- Nanocomposites (1)
- Nanocracks (1)
- Nanostructures (1)
- Nanostrukturen (1)
- Neues Prinzip der computer-tomographischen Rekonstruktion ohne Fourier-Filterung (1)
- Neutron computed tomography (1)
- Neutronen-Radiographie (1)
- Neutrons (1)
- Non-destructive evaluation (1)
- Non-metallics (1)
- Nondestructive characterization (1)
- Nondestructive materials characterisation (1)
- Nondestructive testing (1)
- Oberfläche, innen (1)
- Opacity (1)
- Oxidative Schädigung (1)
- PE-HD Sorption (1)
- Phase boundary (1)
- Phase contrast radiography (1)
- Phase grating (1)
- Phase-contrast X-ray imaging (1)
- Polymers (1)
- Polypropylene-graft-maleic anhydride (1)
- Pore Orientation (1)
- Pore Size (1)
- Pore size analysis (1)
- Porengröße (1)
- Porenorientierung (1)
- Porosity fluctuation (1)
- Porous Ceramics (1)
- Poröse Keramik (1)
- Quantitative image analysis (1)
- Quenching (1)
- Radiology (1)
- Reconstruction (1)
- Reconstruction algorithms (1)
- Reconstruction algrorithm (1)
- Reflectometry (1)
- Refraktion (1)
- Refraktionskontrast (1)
- Refraktionstopographie (1)
- Rekristallisation (1)
- Renewable energy (1)
- Rissdichte (1)
- Risse (1)
- Röntgen-Diffraktions-Mikroskopie (1)
- Röntgen-Kanten-Tomographie (1)
- Röntgen-Refraktion (1)
- Röntgen-Refraktions-Computer-Tomographie (1)
- Röntgen-Szintillationsdetektor hoher Zählraten (1)
- Röntgen-Topographie (1)
- Röntgen-Topographie und -Streuung (1)
- Röntgenstreuverfahren (1)
- SAXS (1)
- SCS6 (1)
- SRCT (1)
- Scanning transmission electron microscopy (STEM) (1)
- Schlagfestigkeit (1)
- Scintillator (1)
- Shearing gratings (1)
- Small angle scattering (1)
- Spatial reslution (1)
- Spatial statistics (1)
- Specific surface area (1)
- Spectral computed tomography (1)
- Statistical analysis (1)
- Strain hardening (1)
- Stromdichtemessung (1)
- Structural (1)
- Structure property relations (1)
- Surface density (1)
- Synchrotron Laue Contrast Radiography (1)
- Synchrotron Laue Contrast Radiography SLCR (1)
- Synchrotron X-ray tomography (1)
- Synchrotron instrumentation (1)
- Synchrotron radiography (1)
- Synchrotron, BAMline (1)
- Synchrotron-CT (1)
- Synchrotron-Radiographie (1)
- Talbot- Lau interferometry (1)
- Talbot-Lau (1)
- Talbot-Lau interferometer (1)
- Talbot-Lau neutron tomography (1)
- Tensile load (1)
- Terahertz Imaging (1)
- Terahertz time domain spectroscopy (1)
- Terahertz-Radiography (1)
- Texture (1)
- Thermal stability (1)
- Thermoplaste (1)
- Threat Detection (1)
- Three-dimensional data quantification (1)
- Ti6242 (1)
- Titanium Metal Matrix Composites (Ti-MMC) (1)
- Tomographic reconstruction (1)
- Tomographische Rekonstruktions-Algorithmen (1)
- Tortuosity (1)
- USAXS (1)
- Verbundwerkstoff (1)
- Vergrößerung mit asymmetrischen Kristallen (1)
- Verschmierung (1)
- Visibility (1)
- Wassermanagement (1)
- Water transport path (1)
- Wavelet transform (1)
- Wavelet transformation (1)
- Wide angle X-ray scattering (1)
- X-Ray Computed Tomography (1)
- X-ray absorption and refraction CT (1)
- X-ray computed tomography (1)
- X-ray detector (1)
- X-ray detector scattering (1)
- X-ray diffraction (1)
- X-ray diffraction microscopy (1)
- X-ray fluorescence analysis (1)
- X-ray imaging (1)
- X-ray microscopy (1)
- X-ray phase contrast (1)
- X-ray refractometry (1)
- X-ray scattering topography (1)
- XROT (1)
- Zerstörungsfrei (1)
- Zerstörungsfreie Materialcharakterisierung (1)
Organisationseinheit der BAM
Eingeladener Vortrag
- nein (34)
Kohlenstofffaser verstärkte Kohlenstoffe werden während ihres Ge-brauches an Luft zwischen 600°C und 1000°C korrodiert. Um zu überprüfen, ob die Röntgerefraktionsmethode als zerstörungsfreies Prüfverfahren die bei der Oxidation auftretenden morphologischen Änderungen im Probekörper signifikant nachweisen können, wurden bei 630°C oxidativ geschädigte gasphaseninfiltrierte C/C Kerami-ken untersucht. Anhand eines Kugelmodells werden die aus dem Experiment ableit-baren Größen der spezifischen Oberfläche und Porosität erläutert. Die experimen-tellen Ergebnisse konntne nachweisen, dass infiltrierten C/C Keramiken während einer oxidativen Belastung aufgrund des lokal unterschiedlichen Oxidationsverhal-tens eine ausgeprägte Kern Schale Struktur ausbilden.
Rekonstruktionsalgorithmen
(2007)
The use of high brilliance and partial coherent synchrotron light for radiography and computed tomography (CT) allows to image micro-structured, multi-component specimens with different contrast modes and resolutions up to submicrometer range. This is of high interest for materials research, life science and non-destructive evaluation applications. An imaging setup for microtomography and radiography installed at BESSY II (a third generation synchrotron light source located in Berlin, Germany) as part of its first hard X-ray beamline (BAMline) can now be used for absorption, refraction as well as phase contrast dedicated to inhouse research and applications by external users. Monochromatic synchrotron light between 6 keV and 80 keV is attained via a fully automated double multilayer monochromator. For imaging applications the synchrotron beam transmitted by the sample is converted with a scintillator into visible light. By use of microscope optics this luminescence image is then projected onto, e.g., a CCD chip. Several scintillating materials are used in order to optimise the performance of the detector system. Different optical systems are available for imaging ranging from a larger field of view and moderate resolutions (macroscope up to 14 mm x 14 mm field of view) to high resolution (microscope down to 0.35 μm pixel size), offering magnifications from 1.8× to 40×. Additionally asymmetric cut Bragg crystals in front of the scintillator can be used for a further magnification in one dimension by a factor of about 20. Slow and fast cameras are available, with up to 16 bit dynamic range. We show the suitability of the setup for numerous applications from materials research and life science.
Mit dem Einsatz von Terahertz-Wellen eröffnen sich gegenüber Röntgenstrahlung neuartige Möglichkeiten der Radiologie. Von der dielektrischen Materialcharakterisierung nicht metallischer Werkstoffe bis zur Detektion des Innenlebens von unkonventionellen Spreng- und Brandvorrichtungen (USBV) wird ein großes Anwendungsspektrum für die bildgebende zerstörungsfreie Prüfung abgedeckt. Die physiologische Unbedenklichkeit der Strahlung favorisiert sie auch für Personenkontrollen an Flughäfen. Das Prinzip eines modernen zeitauflösenden Terahertz-Spektrometers mit einer Ortsauflösung bis 0,3mm und einem Frequenzbereich von 0,1 bis 2,2THz wird erläutert sowie die Wechselwirkung mit Materie. Die Besonderheiten von THz-Topogrammen werden am Beispiel einer Briefbombenattrappe mit Röntgen-Radiogrammen verglichen.
X-ray refraction topography techniques are based on ultra-small angle scattering by micro-structural elements causing phase-related effects such as refraction and total reflection at a few minutes of arc as the refractive index of X-rays is nearly unity. The refraction contrast is several times higher than true absorption and results in images of cracks, pores and fibre debonding separations below the spatial resolution of the detector. In most cases the investigated inner surface and interface structures correlate to mechanical properties. For the exploration of micro structured materials the refraction technique has been improved by a 3D Synchrotron Refraction Computed Tomography test station. The specimen is placed in an X-ray beam between two single crystals, which suppresses all sample scattering. In addition, an asymmetric cut second crystal can magnify the image up to 50 times revealing nano meter resolution. The technique is an alternative to other attempts on raising the spatial resolution of CT machines.